John boyd dunlop



(No Model.)` y J- B. DUNLOP. I

Y WHEEL TIRE FOR CYCLES. 190.435995. Patented Sept. 9, 1890.

mi mms persas co., wow-umn., wAsnlmnon, n. c.

JOHN BOYD DUNLOP, F BELFAST, IRELAND.

vez-resortes mercies,

'srncrrrcn'rron' fer-ming part er nen-,ere raient menaces, assed septemnere, rseo.- f dpolication filed Enroll l1,v 1890 Serial No. 343,445. (No model.) Patented in England Marel: 8f i889, No. 111116. A 9

To @ZZ whom it may concern:

4 'Be it known that l, JOHN BOYD Donner, of 50 Gloucester Street, Belfast, ireland, a subject of the Queen of Great Britain, have in 5 'vented certain nevi7 and useful Improvements inflated with air or gas under pressure and,

' surrounded with cloth, canvas, or other suitahlematerial to adapt it'tovwithstand the in tornai pressure of thevvithin-contained air enges and to allow-of its being maintained ze securely in position onthe rim of the cycle or vehicle Wheel.

in order that my invention may ne the better understood, l `have appended the accompanying drawing, the figure there shown illusltrating a crcsssection,on enlarged scale, of

the tirev constructed according' to myjnventieni.

In carrying out nay-invention I employ an external covering A, composed of a layer or 3c fold of india-rubber, which is thickened at that portion which comes in contact with the ground.v An inner expansible tube B, also vofindia-rubber, contains the air or gas under l press-nre.

j C is the metallic rim of the wheel, which is somewhat Iiattened to obtaina large bearingsurface, and enveloped with a protective strip a,of canvas, cloth, linen, or the like. Strips vl), ocaoutchouc' or other elastic substance,

4.o are interposed between the edges of the rim C and thelfoldlfQl-layerskb c, of canvas or linen, hereinafter more particularly referred to, so as to yprotect the latter from being cut by the edgesof said rim C. A strengthening fold or layer b ofcloth, linen, or canvas, which is cemented or otherwise axed to the inner surface of the external 4covering A, envelope.

Aring' folds or resist any nndne pressure that may be ex- `oticnlar point, and thus prevent 'deformation --of the tire. The said folds or layers,-1nore fever, serve to electually maintain-the tire the inner surface of the beorennentioned layer b and eemen'tedto the linen or canvas layer a, encircling the metallic rim- Cr At any suitable point on the rim of the wheel l provide a-non-retnrnfvalve, which is inserted vthrough an aperture formed for the purpose in the metallic; rim 0, andfprotrudes within Ithe inner ex ansible tnbe, The'envelopyer-s of 4c anves-22 c edectually ,erted by the contained air or gas at any parin the desiredfposition'on the metallic rim C of .the wheel.

From. the. ioregoing, description itwill be. obvious that a hollow air-intlated india-rub loer tire constructed according to my invention possesses several important advantages over the solid india-rubher tires at present in use, inasmuch as, vvhilc being equal in strength to those ordinarily made, it is more elastic, all vibration and' shock when riding -or driving over rough roads being intercepted between the rim of the Wheel and thegronnd. Oonsequentlylittle or no -jar is experienced by the rider or riders of the cycle or occupants'of the vehicle to which my in xproven ments are applied Having now particularly described and aecertainedthe nature ot my said invention and in what manner the same is to be performed, l declare that whatl claim is In hollow air-indated wheel-tires for cycles and otherveliicles, the combination, with an inner expansfible tube B and outer protective covering A, of strengthening folds or layers b c of cloth, canvas, or linen, and protective ystrips D' of caoutchouc interposed between the edges of the rim C and strengthening fold cr'layer b, substantially as and for the 'purposes herein set forth.

In testimony that I claim the foregoing as my invention. l ama my signaturein presence of 'two witnesses. i

JOHN BOYD Dllhlllll.v fr.. n]

Witnesses:

Haaren Cniwronn,

' LnXnnnnn Anm. Noarys elsst'stxnts', l0 .Arthur Street, Belfast,

Ireland- 

